Hugh hughes



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IMPROVEMENT I DOOR-SPRINGS.

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TO ALL WHOU I'DMAY CONCERN:

Beit known that I, HUGH HUGHES, of the city of Utica, in the county of Oneida, and State of New York, have invented a new and useful Door-Spring for closing doors; and I do hereby declare that the following is a full, clear, and`exact description ot' the construction and operation of the same, reference being had to the annexed drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the adoption of a thong or strap of India rubber or other elastic material, which is so connected with a peculiar mechanical arrangement of connected parts as to form a cheap, simple, and useful spring for the purpose aforesaid.

Figure l ofthe annexed drawings exhibits a model door with my spring attached,

The spring, including its construction, consists of three parts; a is the frame or stationary part, and is screwed to the door-frame J, b c is the arm that actuatcsthe spring, and (Z is the elastic spring, and connects the other two parts. The stationary fr-alne a has t'wo horizontal studs, e and j", the former being short, and the latter being a little more extended. vThe' former has one or niore vertical pins, ot'er one of which the rear end of the rubber spring "I is looped, as seen ntf/ More than one pin may be used here as alternatives to adjust thc tension of the spring. The stud .7" has also a vert-ical pin, not-for the rubber spring, but for the hinge or fulcrum of the actuating arm b l, as seen at C. The arm Il c not only has the eye at C forming with the last-mentioned pin the hingeoi' theI article, but it has another vert-ical pin L, and over this latter pin is looped the other end of' the rubber lspring f1. Between the hinge C and the last-mentioned 'pin the arm b c curves backward, as shown, and widens out upward, forming a setn'icircular curve or cam. The rubber spring is looped at one end over the pin at y, and being stretched around the cam aforesaid, the other end is looped` over the pin at i, and with such-'tension that theextremity of the arm b c is pressed against the plane of the door through the intervention of the sheave n. This sheave is made to turn looselyr on the pendent pin l, and rolls upon the surface of the d'oor as it opens and closes, with a constant tendency, through the action ofthe spring b c, to close the door. This is all clearly seen by an inspection of the drawing.

Figure 2 exhibits a top view of' the article described. J is .the door-casing, a the edge of the stationary plate screwed to the easing, d is the rubber spring, and bic the actuating arms.

Figure 3 is a like top view, with the doorm partly open- All the parts beingr designated by corresponding letters of reference in all the drawings.

Having thus described my invention and its construction and operation, what I claim as my invention, and desire to secure by Letters Patent, is-

The' construction aud arrangement of the door-spring above set forth and described.

HUGH HUGHES.

Witnesses:

WM. BAKER, WILLIAM BRENNER. 

